Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Net revenues	$ 6,047.9	$ 5,029.6	$ 3,953.0
Operating costs and expenses
Cost of sales	5,841.7	4,981.0	4,070.8
Selling, general and administrative	281.9	279.2	279.9
Restructuring Charges	7.2	0.2	8.2
Research and development	45.4	50.4	53.3
Total operating costs and expenses	6,182.1	5,310.8	4,412.2
Operating loss	(134.2)	(281.2)	(459.2)
Interest expense and financing fee amortization	(318.7)	(244.1)	(242.6)
Other (expense) income, net	140.4	14.1	(146.6)
Loss before income taxes and equity in net loss of affiliates	(593.3)	(539.4)	(555.2)
Income tax (provision) benefit	(22.5)	(5.2)	17.2
Loss before equity in net loss of affiliates	(615.8)	(544.6)	(538.0)
Equity in net loss of affiliates	(0.3)	(1.6)	(2.8)
Net loss	$ (616.2)	$ (545.7)	$ (540.8)
Loss per share
Basic (in dollars per share)	$ (5.78)	$ (5.21)	$ (5.19)
Earnings Per Share, Diluted	(5.78)	(5.21)	(5.19)
Common Stock, Dividends, Per Share, Declared	$ 0.00	$ 0.03	$ 0.04
Net Income (Loss) Attributable to Noncontrolling Interest	$ (0.1)	$ 0.5	$ 0.0
Net income	(616.2)	(545.7)	(540.8)
Income (Loss) from Equity Method Investments	(0.3)	(1.6)	(2.8)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(616.1)	(546.2)	(540.8)
Other Expenses	5.9	0.0	0.0
Interest and Debt Expense	318.7	244.1	242.6
Other Nonoperating Income (Expense)	$ (140.4)	$ (14.1)	$ 146.6